//
//  CZVisitorView.swift
//  weibo
//
//  Created by Ken on 16/3/21.
//  Copyright © 2016年 Ken. All rights reserved.
//

import UIKit

//1 定义协议
@objc protocol CZVisitorViewDelegate: NSObjectProtocol{
    //2 定义方法
    //注册按钮被点击
    optional func visitorViewDidClickRegisterButton()
    
    //登录按钮被点击
    optional func visitroViewDidClickLoginButton()
    
}

class CZVisitorView: UIView {
    weak var delegate: CZVisitorViewDelegate?

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    override init(frame: CGRect) {
        
        super.init(frame: frame)
        prepareUI()
    }
    
    /**
     设置访客视图
     
     - parameter imageName: 图片名称
     - parameter message:   文字
     */
    func setupVisitor(imageName: String, message: String) {
        homeView.hidden = true
        
        //父控件将一个子控件推到最底部
        self.sendSubviewToBack(coverView)
        
        iconView.image = UIImage(named: imageName)
        messageLabel.text = message
    }
    
    
    ///开始旋转
    func startRotation() {
        let rotation = CABasicAnimation(keyPath: "transform.rotation")
        rotation.toValue = M_PI * 2
        rotation.duration = 20
        rotation.repeatCount = MAXFLOAT
        
        // 完成的时候不要移除
        rotation.removedOnCompletion = false
        
        //添加到图层上面
        iconView.layer.addAnimation(rotation, forKey: nil)
        
    }
    
    //准备 UI
    private func prepareUI(){
        backgroundColor = UIColor(white: 237/255.0, alpha: 1)
        
        //1 添加子控件
        addSubview(iconView)
        addSubview(coverView)
        addSubview(homeView)
        addSubview(messageLabel)
        addSubview(registerButton)
        addSubview(loginButton)
        
        //2 添加约束
        iconView.translatesAutoresizingMaskIntoConstraints = false
        coverView.translatesAutoresizingMaskIntoConstraints = false
        homeView.translatesAutoresizingMaskIntoConstraints = false
        messageLabel.translatesAutoresizingMaskIntoConstraints = false
        registerButton.translatesAutoresizingMaskIntoConstraints = false
        loginButton.translatesAutoresizingMaskIntoConstraints = false
        
        
        
        // 转轮
        /**
            1.item: 要约束的View
            2.attribute: 要约束的view的属性
            3.relatedBy: 参照
            4.toItem: 参照的View
        */
        addConstraint(NSLayoutConstraint(item: iconView, attribute: NSLayoutAttribute.CenterX, relatedBy: NSLayoutRelation.Equal, toItem: self, attribute: NSLayoutAttribute.CenterX, multiplier: 1, constant: 0))
        
        addConstraint(NSLayoutConstraint(item: iconView, attribute: NSLayoutAttribute.CenterY, relatedBy: NSLayoutRelation.Equal, toItem: self, attribute: NSLayoutAttribute.CenterY, multiplier: 1, constant: -40))
        
        // 遮罩
        addConstraint(NSLayoutConstraint(item: coverView, attribute: NSLayoutAttribute.Leading, relatedBy: NSLayoutRelation.Equal, toItem: self, attribute: NSLayoutAttribute.Leading, multiplier: 1, constant: 0))
        
        addConstraint(NSLayoutConstraint(item: coverView, attribute: NSLayoutAttribute.Trailing, relatedBy: NSLayoutRelation.Equal, toItem: self, attribute: NSLayoutAttribute.Trailing, multiplier: 1, constant: 0))
        
        addConstraint(NSLayoutConstraint(item: coverView, attribute: NSLayoutAttribute.Top, relatedBy: NSLayoutRelation.Equal, toItem: self, attribute: NSLayoutAttribute.Top, multiplier: 1, constant: 0))
        
        addConstraint(NSLayoutConstraint(item: coverView, attribute: NSLayoutAttribute.Bottom, relatedBy: NSLayoutRelation.Equal, toItem: registerButton, attribute: NSLayoutAttribute.Bottom, multiplier: 1, constant: 0))
        
        // 小房子
        addConstraint(NSLayoutConstraint(item: homeView, attribute: NSLayoutAttribute.CenterX, relatedBy: NSLayoutRelation.Equal, toItem: iconView, attribute: NSLayoutAttribute.CenterX, multiplier: 1, constant: 0))
        
        addConstraint(NSLayoutConstraint(item: homeView, attribute: NSLayoutAttribute.CenterY, relatedBy: NSLayoutRelation.Equal, toItem: iconView, attribute: NSLayoutAttribute.CenterY, multiplier: 1, constant: 0))
        
        // 消息label
        addConstraint(NSLayoutConstraint(item: messageLabel, attribute: NSLayoutAttribute.CenterX, relatedBy: NSLayoutRelation.Equal, toItem: iconView, attribute: NSLayoutAttribute.CenterX, multiplier: 1, constant: 0))
        
        addConstraint(NSLayoutConstraint(item: messageLabel, attribute: NSLayoutAttribute.Top, relatedBy: NSLayoutRelation.Equal, toItem: iconView, attribute: NSLayoutAttribute.Bottom, multiplier: 1, constant: 16))
        
        // 当toItem = nil时, attribute一定要设置为: NSLayoutAttribute.NotAnAttribute
        addConstraint(NSLayoutConstraint(item: messageLabel, attribute: NSLayoutAttribute.Width, relatedBy: NSLayoutRelation.Equal, toItem: nil, attribute: NSLayoutAttribute.NotAnAttribute, multiplier: 1, constant: 250))
        
        // 注册按钮
        addConstraint(NSLayoutConstraint(item: registerButton, attribute: NSLayoutAttribute.Leading, relatedBy: NSLayoutRelation.Equal, toItem: messageLabel, attribute: NSLayoutAttribute.Leading, multiplier: 1, constant: 0))
        addConstraint(NSLayoutConstraint(item: registerButton, attribute: NSLayoutAttribute.Top, relatedBy: NSLayoutRelation.Equal, toItem: messageLabel, attribute: NSLayoutAttribute.Bottom, multiplier: 1, constant: 16))
        
        addConstraint(NSLayoutConstraint(item: registerButton, attribute: NSLayoutAttribute.Width, relatedBy: NSLayoutRelation.Equal, toItem: nil, attribute: NSLayoutAttribute.NotAnAttribute, multiplier: 1, constant: 100))
        addConstraint(NSLayoutConstraint(item: registerButton, attribute: NSLayoutAttribute.Height, relatedBy: NSLayoutRelation.Equal, toItem: nil, attribute: NSLayoutAttribute.NotAnAttribute, multiplier: 1, constant: 35))
        
        // 登录按钮
        addConstraint(NSLayoutConstraint(item: loginButton, attribute: NSLayoutAttribute.Trailing, relatedBy: NSLayoutRelation.Equal, toItem: messageLabel, attribute: NSLayoutAttribute.Trailing, multiplier: 1, constant: 0))
        addConstraint(NSLayoutConstraint(item: loginButton, attribute: NSLayoutAttribute.Top, relatedBy: NSLayoutRelation.Equal, toItem: messageLabel, attribute: NSLayoutAttribute.Bottom, multiplier: 1, constant: 16))
        
        addConstraint(NSLayoutConstraint(item: loginButton, attribute: NSLayoutAttribute.Width, relatedBy: NSLayoutRelation.Equal, toItem: registerButton, attribute: NSLayoutAttribute.Width, multiplier: 1, constant: 0))
        addConstraint(NSLayoutConstraint(item: loginButton, attribute: NSLayoutAttribute.Height, relatedBy: NSLayoutRelation.Equal, toItem: registerButton, attribute: NSLayoutAttribute.Height, multiplier: 1, constant: 0))
    }
    
    /*
        按钮点击
            1.屏幕上点击
            2.iOS系统触摸屏驱动会相应到你点击的区域,驱动会上报给iOS系统
            3.系统先会找到,正在运行行的程序
            4.事件处理,先分发给UIAppolication
    */
    /// MARK: - 按钮事件的方法
    @objc private func didClickRegisterButton(button: UIButton){
        
        delegate?.visitorViewDidClickRegisterButton?()
    }
    
    func didClickLoginButton(){
        delegate?.visitroViewDidClickLoginButton?()
    }
    
    
    // MARK: - 懒加载
    /// 转轮
    private lazy var iconView: UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_image_smallicon"))
    
    /// 遮罩
    private lazy var coverView: UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_mask_smallicon"))
    
    /// 小房子
    private lazy var homeView: UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_image_house"))
    
    /// 消息 label
    private lazy var messageLabel: UILabel = {
        let label = UILabel()
        
        label.text = "关注一些人,看看有什么惊喜!!"
        label.textAlignment = NSTextAlignment.Center
        label.font = UIFont.systemFontOfSize(18)
        label.numberOfLines = 0
        label.sizeToFit()
        
        return label
    }()
    
    
    //注册按钮
    private lazy var registerButton: UIButton = {
        let button = UIButton()
        
        // 设置
        button.setBackgroundImage(UIImage(named: "common_button_white_disable"), forState: UIControlState.Normal)
        
        button.setTitle("注册", forState:  UIControlState.Normal)
        button.setTitleColor(UIColor.orangeColor(), forState: UIControlState.Normal)
        
        //添加点击事件
        button.addTarget(self, action: "didClickRegisterButton:", forControlEvents: UIControlEvents.TouchUpInside)
        
        return button
    }()
    
    
    /// 登录按钮
    private lazy var loginButton: UIButton = {
        let button = UIButton()
        
        //设置
        button.setBackgroundImage(UIImage(named: "common_button_white_disable"), forState: UIControlState.Normal)
        
        button.setTitle("登录", forState:  UIControlState.Normal)
        button.setTitleColor(UIColor.blackColor(), forState: UIControlState.Normal)
        
        //添加点击事件
        button.addTarget(self, action: "didClickLoginButton", forControlEvents: UIControlEvents.TouchUpInside)
        return button
    }()

}
